An element belongs to the third period and Group III A (13) of the periodic table. State the valency

Explanation

To determine the valency of an element that belongs to the third period and Group III A (13) of the periodic table, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Element**:
- The element in the third period and Group III A (13) is Aluminium (Al).

2. **Determine the Atomic Number**:
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